Okbigel



Suki. CAMPBELL.

JOURNAL BEARING WEDGE.

APPLICATION FILED APR. 1|, 1919 1,3 1 5,0U7 Il-utenfed Sept. 2, 1919.

2 SHEETSSHEET l.

INVENTDR 1 .fiampeH ElY ATTURNEY S. H. CAMPBELL.

JOURNAL BEARING WEDGE.

APPLICATION FILED APR.1I,19I).

. Paton ted Sept.

2 SHEETS SHEET 2.

, INVENTUR 5.. EampbeH I DU ATTORNEY smmm n. CAMIE'IBELL, or am. tours, mssounr.

' JUNE-BEARING WEDGE.

amont.

Specification of Letters Patent.

Patented Sept. 2, this Application filed a rn 11, 1am. Serial nu. aaaaoa I Bearing wedge, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specificat on.

My invention relates to a journal bearing wedge for railway cars, itsobjects being to produce a wedge which combines the advantageous features of lightness with sufficient strength, excellent wearing quality, low cost of manufacture, and means for minimizing if not wholly preventing undue heating of the journal and associated parts in operation. Specifically, my invention relates to a onepiece hollow wedge of the type illustrated in Fig. 10 of my United States Patent No. 1,022,400 wherein the walls of the wedge are of substantially uniform thickness to permit satisfactory annealing. The wedge. described in said patent was found to beunsatisfactory on account of insuficient strength of the front and rear walls and in that the difiiculties in casting. it precluded its manufacture at satisfactory cost. In the wedge herein described these disadvantages are avoided and means for keeping the wedge cool in operation have been provided.

In the accompanying drawings, Figure 1 is a vertical section of the M. C. B. standard oil box to which my improved wedge is applied, Fig; 2 is a horizontal longitudinal section along the line 2-2 of Fig. 1 showing a portion of the wedge'in plan vlew. Fig. 3 is a transverse section of the wedge along the line 33 of Fig. 2.

1 represents a'journal box having a cover 2 and dust guard 11, all of standard design, the cover being held closed by spring 3 extending only partly across the upper part of the opening of the journal box whereby space is afforded for, passage of air at the sides of the spring and through the opening provided by the clearance between the upper edge of the cover and the box as indicated lib in the drawing; 4 represents the bearing portion of the car axle, 5 the brass, and 6 the journal bearing wedge embodying my inventiom.

The walls of the wedge are of uniform thickness, the lower surfaces, both horizontal and inclined, conform to the surfaces of the brass so that all portions of the lower surfaces of the wedge are adapted to form a part of the bearing surface. In like manner' all parts of the top surface 7 of the wedge within the outer limits of the area of engagement of the wedge with the journal box form parts of a single cylindrical surface and are adapted to engage in operation with the journal box and serve as part of the bearing surface. The top surface of the wedge is connected to and supported from the bottom surface 8 by spaced integral webs 9 which are only of. sufficient number to provide the necessary supporting strength and are so distributed as not to substantially interfere with the circulation of the air from one part of the interior of thewedge to another. The sides of the wedge are provided with a plurality of openings 10, preferably oppositely positioned, and communicatin with the hollow interior of the wedge. The out and end walls of the wedge are subjected to severe shocks in the o eration of a car and in order that all the wal s of the wedge be of uniform thickness and at the same time the wedge as a whole made relatively light it' is essential that these front and end walls be not weakened by any openings. It has also been found that when the core print openings are positioned in, the frontand rear walls the pocketing of gases usually prevents proper filling of the mold with metal. By arranging the core to form a plurality of openings. in the lateral wallsand spaced-as shown, all difiiculty of making a good casting is overcome; the positions of the holes are such that theyv do not disadvantageously weaken the casting; and they form an exceedingly useful function in the wedge since their position along the greatest length of the wedge produces a short path from the center line of the wedge to the exterior whereby excellent ventilation is secured. It has been found in practice that journal boxes equipped with wedges constructed in accordance with my invention seldom, if ever, become unduly hot and this is to be attributed to the fact that heated air is discharged from the interior of the wedge into the relatively large spaces between the wedge andthe walls of the box whence it may escape from the box either under the upper portion of the cover or past the dust guard. The rotation of the axle tends to produce an air circulation in theupperpart of the box along the axes of ficient strength thus resulting in low cost of manufacture and greater convenience in handling; and finally is so, constructed as to facilitate the rapid dissipation of frictional heat developedin the operation of the journal as distinguished from the heat retaining qualities of solid wedges or those in which closed air pockets are formed.

Having may described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1'. A hollow' journal bearing wedge having a plurality of ventilating openings in its lateral walls communicating with the interior of the wedge.

2. A hollow journal bearing wedge having all its walls of substantially uniform thickness, the front and rear Wall's being imperforate and the lateral walls being provided with a plurality of spaced ventilating openings communicating with the interior of the wedge.

3. A hollow ournal bearing wedge having its entire upper face in a single cylindrical surface, its front and rear walls imperforate, and its lateral'walls provided with spaced openings communicating with the interior of the wedge.

4. A hollow one piece journal bearing wedge having a plurality of oppositely positioned openings in its lateral walls and communicating with the interior of the wedge.

5. A hollow journal bearing wedge having a plurality of spaced short integral webs connecting its top and bottom walls and a plurality of spaced ventilating openings in its lateral walls communicating with the interior of the wedge.

6. A hollow journal bearing wedge having all its walls of substantially uniform thickness; substantially the entire upper and lower Surfaces of the wedge being adapted to form bearing surfaces, integral spaced webs connecting the top 'and bottom walls of the wedge and permitting communication between all parts of the interior of the wedge, said wedge also having imperforate front and rear walls and spaced oppositely located openings in its lateral walls communicating with the interior of the wedge.

In testimony whereof, I have hereunto set my hand and afiixed my seal.

STERLING H. CAMPBELL. [L. s.] 

